BTC is now the base.
Most of the exchanges have BTC as prime currency to trade with.
If BTC will have the hard fork, means BTC will sink.
Is that means that all exchanges will now put ETH as prime coin to trade with?
No matter what bitcoin will face, it will always be the king of cryptocurrencies. If btc falls, others fall, if btc rise, others rise. And do understand fork isn't for bad or end of bitcoin but to give reboot to btc ecosystem. Don't you wanna see new members attaching to it, transacting bitcoin, giving it utility? It is only possible with amendments in btc through fork and I am sure btc will rise again with great force.